构造函数实现窗体间传值

///Form1.cs  the form contains a textbox and a button

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;



namespace 窗体间通迅

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm = new Form2(this.textBox1);

            frm.Show();



        }

    }

}



///Form2.cs  the form contains a textbox and a button

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;



namespace 窗体间通迅

{

    public partial class Form2 : Form

    {

        private delegate void dg();



        /// <summary>

        /// 让其与窗体1的TextBox1同一个引用。

        /// </summary>

        private TextBox textBox12;



        public Form2()

        {

            InitializeComponent();

        }



        public Form2(TextBox txtBox)

        {

            InitializeComponent();

            textBox1.Text = txtBox.Text; ;

            this.textBox12 = txtBox;

            

        }



        private void button1_Click(object sender, EventArgs e)

        {

            textBox12 .Text  = textBox1.Text;

            this.Close();

            

        }

    }

}